Weft binding and cutting device for looms.



w. w. STEARNS. WEFT BINDING AND CUTTING DEVICE FOR L-OOMS.

APPLICATION FILED SEPT. 2|. l9l5- 1,21 9,182. Patented M r; 13, 1917.

IN VENTOR, MM hi fiawms;

A TTORNE Y.

WILLARD W. STEARNS, OF HOLYOKE, MASSACHUSETTS.

WEFT BINDING AND GUTTING DEVICE F03 LOOIVIS.

Specification of Letters Patent. Patented B131. 13, 1917.

Application filed September 21, 1915. Serial No. 51,888.

To all whom it may concern:

Be it known that I, WILLARD W. STEARNS, a citizen of the United States of America, and resident of IIolyoke, in the county of I-Iampden and State of Massachusetts, have invented certain new and useful Improvements in W'eft Binding and Cutting Devices for Looms, of which the following is a full, clear, and exact description.

This invention relates to devices employed in automatic looms of a well known type in which bobbins from the magazine are periodically delivered into the shuttle while the latter is boxed, causing the expulsion from the shuttle of the bobbin from which the weft thread or filling has become exhausted.

In automatic looms of the type referred to, the means for replenishing the bobbins in the shuttle and causing the expulsion of the exhausted bobbins is controlled by a socalled feeler motion or mechanism operating in conjunction with which is a device opposite the location of the inner end of the shuttle box which is operable to both temporarily bind the weft or filling and to sever it near where it is bound, and also operative thereafterto release the bound and severed portion of the weft so that the remnants of the weft from an exhausting bobbin may not become entangled with that of the freshly supplied bobbin or become woven into the cloth.

The features of improvement in the combined feeler thread binder and cutter of the general kinds or constructions now commercially employed in automatic looms reside-in a non-metallic movable clamp memher, most advantageously composed of fiber board, fiberoid, or like hard composition or material which in its coaction with the relatively stationary adjacent member is operative for its many times repeated bind 'wise flush and fiat against the metallic member with which it coacts.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings Figure 1 is a side elevation showing the combined feeler thread binder and clamp wlth the jaw members thereof half way between open and closed positions.

Flg. 2 is a horizontal sectional view on line 22, Fig. 1.

Fig. 3 is a cross sectional view on line 33, Fig. 1, as seen in the direction of the arrow.

Fig. 4 is a sectional view similar to Fig. 3, but showing fully closed relations of the relatively movable parts.

Fig. 5 is a face view of the movable cutting bla'de'comprised-in the device as seen oppositely faced from the representation shown in Figs. 1 and 2.

In the drawings, A represents the carrier and support of the combined thread binder and cutter for a loom; B represents a steel blade or plate mounted on the face of the carrier support and constituting the fixedjaw of the thread cutter. C is a metallic plate facewise parallel with and spaced from the carrier support and the fixed jaw B, and so connected or engaged therewith as to be substantially immovable relatively thereto.

D and E represent combined and facewise adjacent cutter and binder jaws together pivotally mounted on the pivot a which is supported by the carrier support and extends through the spaced binder jaw C, and which are interengaged by a pin and dowel indicated at Z) so that one may not have any swinging movement relatively to the other.

The cutter jaw D has a projecting arm cl through means of which the movable parts of the binder and cutter are actuated in the operation of the loom.

The parts C, E and B are held in their proper relations and have frictional facewise binds one with another by means of the headed stud 7 and the flat metal spring 9.

The device, comprising coacting shear knives or cutter jaws, and coacting binder jaws or members, is in the general aspect seen in Fig. 1, very much as now appearing in the bobbin feeler motion of. a loom of the Northrop type, and as represented in Letters Patent of the United States to extent and with unsatisfac'toi'y results.

Northrop, Septi17, 1907, No. 866,052, and Rhoades December 17, 1912, No. 1,047,448, the device, however, comprising the struc tural features hereinbefore referred to and which will be now particularly pointed out: The pivotaliy mounted and movable binder jaw E is of a suitable non-metallic material such as the well known commer' cial hard fiber or fiber board and by the useof which the liability of the thread or yarn becoming cut when it should only be bound and temporarily held is obviated.

This binder jaw member E of fiberoid of equivalent material has the opposite sides between the end portions thereof reduced in thickness. as indicated at'h it inFig. 2, so that there will be tacewise bearings of the end portions only of the binder menr ber against the portions of the device at opposite sides thereof, whereby warping of the binder jaw member is prevented.

I am aware than non-metallic clamping jaws or members in the binding portion of a thread binder and cutter have been heretofore proposed and used only to a limited 1 I these cases the nonfmetallic member of the binder has been comprised in the fixed, and not the movable member.

It has been proved by practical use that all fixed non-metallic members of the binder are ineflicient in the carrying out of the desired purpose as the thread has been drawn down and across the face of the non-metallic member by the actiorij of the swinging jaw when clamping the thread, causing a groove to wear in the relatively immovable non-metallic member and allowing the thread to easily pull or slip out;

13y themse of this movable, non-metallic binding jaw the thread is carried down as one with the aw in the closing of the latter,therc is 115 drawing mot-ion of the thread on and across the jaw and the wearof the jaw by the thread is inappreciable.

This has been proven by the use of a de vice in which the movable binding member was composed of fiberoid in a loom constantly running for over eight months and in which the shuttle bobbin was transferred on an average of every three minutes, and calling at each of such frequent times for the operation ot the binder and cutter, and after all of which period and operations the binder was not measurably impaired.

The blade or knife D of the swinging jaw of the thread cutter or shear has a groove 2' adjacent its cutting edge and within its side wl ich is next to the blade B with which such groove provided jaw coacts.

As will be perceived in Fig. 4, which indicates the cutter jaw D in closed relation to the jaw B, there is but slight tacewise area of the adjoined sides of these jaws which lie one against 0r close to the other,the groove leaving a free or clearance space so that the fine hair-like fibers whichj may be thrown outwardly from the yarn may not be clamped and bound in the knife to result in the holding of the thread at the time the bobbin is being expelled from the shuttle.

The outer jaw C which is parallel with and spaced from the carrier support D has at its end, outwardly divergent threadguiding horns j and m, the lower one of which is in the plane of the swinging movement of the fiberoid binding member E, white the upper horn j is transversely cutwardly inclined as indicated in Fig. 3 for creating a free space between it and the binder blade E, whereby the thread which had been bound between the lower horn and the binder blade, on the opening or releasing movement 0t such blade, will not improperly again be bound between @the blade and the said upper; inclined, horn.

I claim 1. In a device of the character described, a supporting and carrying member having a normally fixed cutter jaw and a binder jaw plate opposite and separated from the supporting member, and none movable relatively thereto, a combined pivotally}: mounted cutter jaw and a non metallic binder jaw between the fixed cut ter jaw and the :binder jaw plate, which latter in its swinging movement facewise on the side of the outer binder jaw is .op-

erative when such jaws are closed to carry thethread to a position between, and to' be bound by, the coacting movable non-metallic binder jaw member and the adjacent relatively immovable binder jaw member.

2. In a device or" the character described, a. suppc ting and carrying member having a metallic binder jaw opposite and separated therefrom anda pivoted binder jaw tacewise in relation said jaw composed of a non metallic material and having intermediate aortions of the sides thereof reduced to permit facewise bearings of the end portions of such member against the poriions of the device at opposite sides thereof for preventing warping of the said non-metallic jaw member.

3. in a device of the character described, a supporting and carrying member made with a cutter jaw thereon, and having a metallic jaw opposite and spaced from such cutter aw, metallic cutter blade or plate, and a plate forming a binder member, which binder member and said cutter'plate are facewise adjoined and engaged one mounted for swinging movements on gtll supporting and carrying member, between blade and the said spaced jaw for the pursame and the said opposite spaced jaw, rpose explained. 10 and said pivoted member being composed Signed by me at Springfield, Mass, in

of a non-metallic material such as fiberoid presence of two subscribing Witnesses.

and having intermediate portions of the WVILLARD V. STEARNS. sides thereof reduced to permit facewise WVitnesses:

bearings of opposite sides of the end por- G. R. DRIsOOLL,

tions of such member against the cutter J. D. LONG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

